Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae93301b300cefc…

MALICIOUS

PDF

79.0 KB Created: 2021-09-09 00:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 64e7c0a30a63ff16e9140e9b4b78bce0 SHA-1: 7e9db54270cc24329a125187ad4d22a03490d9e4 SHA-256: aae93301b300cefc15e1175834242888eb7f0d15622c113ec5917784f5ebb07a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, including one pointing to a raw IP address, suggesting it's part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links to disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5466

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=ip+webcam+home+security+camera+apk PDF link annotation
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/60476154007.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/8886787926.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/nujud.pdfIn PDF document text
    • http://zamgph.com/uploads/file/090508528672.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/gexotevugugivewegivadaw.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/14775525230.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/wokegube.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/52118593370.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/dotujefegiwabakagogogu.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210908052851.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/90585345531.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/wovilaxanalafitev.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/82850548879.pdfIn PDF document text
    • http://philipsphotographystudio.com/19844538272.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40610107837.pdfIn PDF document text
    • http://zamgph.com/uploads/file/011307529686.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/26200532219.pdfIn PDF document text
    • https://network-italia.com/file/kazam.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/70323556863.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/wagowevuwobesusulu.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/fabasir.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/wojajegeleko.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/zaxorupapofojapub.pdfPDF link annotation
    • https://kingdomdatesuae.com/userfiles/files/fojararurusiniz.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/jejavorexamupakikor.pdfIn PDF document text
    • http://webbuilders.com/files/file/56249392607.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D7 10972 bytes
SHA-256: 7565700ff8fc9cb617b3e0b93f02ce6377193cb8ac3efc9399bc8ecb30c3db5c

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